Hi, Its been awhile since I've been here, but hey. You don't have any bottom dwellers, yet. 6-7 panda cories, they don't get too big and are fun too watch as they scout along the bottom for goodies. If your tank is well established 3-4 ottos as well. And then you could get a couple of loaches. Not clown loaches, they get too big, Kuhlies, or straitas, as long as you have hiding places, both need to be in groups and neither are nasty. I could fill a bunch of tanks for you, but you'll do best with fish you like. As long as you avoid the extremes, acclimate very slowly, and keep pristine water conditions, you are limited mostly by who will get along with what you've got. good luck and enjoy.